Vhodné proč?

Má to nějaký vliv na rychlost?

Našel jsem k tomu toto:

Some systems may require you to use the 15 head logical architecture. This is because they translate a drive greater than 4 GB by multiplying the head count by 16. The result (16 x 16 = 256) is interpreted as 0 heads with a 0 capacity and is an illegal head count. Selecting the 15 head logical jumpers produces a legal translation (16 x 15 = 240). The translated cylinder count varies to achieve the drive's full capacity.